G'day

Given the numbers you have supplied and assuming that the motor pulls about 60 Amperes from a 22.2 Volt battery with that prop, it will be generating approximately 1320 watts of power. That is a bit less than 2HP. You will be getting approximately 175 Watts/pound of aircraft. This would put it in the 3D performance range and would be WAY more powerful than the setup you have with the OS 46.

I recently converted a similar 40 size Cessna using a Turnigy 46 motor (ie approximately the same power as a 46 Glow). It has a slightly lower Kv rating and I used a 4 cell 5000 MaH pack and a similar prop to the one you are considering. It flew with plenty of power drawing less than 30 Ampres peak but I did not like the way it flew generally and it is now in semi retirement.

I think you can easily fly the model either with a smaller prop and/or a battery with less cells. One of the advantages of electric motors is that you can simply use a smaller prop to get less power. The benefits are then less current draw and longer flights as a result. And you can easily go back up in power with more prop.

I generally set my electric setups to turn my desired prop size at about 10 to 11,000 rpm by selecting an appropriate number of cells to match the Kv rating. Then measure the current to make sure the limits of the motor and the ESC are not being passed.

I also agree that one battery is not very useful. I now try to have at least two of each size. I also sometimes use 2 x 3 cell packs wired in series to get a 6 cell setup that way I can use the 3 cell packs in smaller planes.

There is no simple answer to all of this. Some experimentation will get you there.

Cheers

Mike in Oz